Heredity and Evolution: Sex Determination & Evolution Theories

Grade 9 Science — Heredity and Evolution: Sex Determination & Evolution Theories: 25 practice questions with instant scoring and explanations.

1. In humans, sex is determined by:
2. A male human has the chromosome combination:
3. Color blindness is more common in males because:
4. Darwin's theory of evolution is primarily based on:
5. Lamarck's theory suggested that:
6. Natural selection occurs because:
7. Speciation refers to:
8. Fossils provide evidence for evolution by showing:
9. The forelimb of a bat, the arm of a human, and the wing of a bird are:
10. Vestigial organs are:
11. The appendix in humans is considered:
12. Comparative anatomy supports evolution by showing:
13. The fossil record shows:
14. Adaptations in organisms develop primarily through:
15. Genetic drift is more pronounced in:
16. If an X-linked recessive disease affects a male, his genotype must be:
17. A carrier of a recessive X-linked trait has genotype:
18. Evolution at the molecular level is studied through:
19. Convergent evolution is when:
20. The Hardy-Weinberg principle states that allele frequencies remain constant if:
21. Artificial selection by humans can change allele frequencies in a population. This demonstrates:
22. A sex-linked trait:
23. If a female is heterozygous for an X-linked recessive trait, her sons have a _____ probability of expressing the trait.
24. The transition fossils between fish and tetrapods (like Tiktaalik) support:
25. Microevolution refers to: